Children, if you'll forgive the cliche, can be terribly cruel. And now they can be cruel over the internet and mobile phones. "It's really easy to make a web page," says 13-year-old Beccy, who knows more than she'd like about the subject. "They wrote about me and my friends. About how much they hate us, about what we'd supposedly done with boys, what we had said about people, which was totally untrue. Even when they're not in your face, you're scared out of your wits. You feel on your own, like you're in a glass box and you scream at everyone but they can't hear you. Your home is supposed to be a safe haven, but then ... you have people being really awful to you on the internet. Where can I hide?"

She's one of the poor kids interviewed in Bullying.com (11am, Radio 4). Penny Marshall presents this three-part investigation into cyberbullying.

And Radio 1's still celebrating its 40th birthday. Radio 1 Legends (9pm) gives some of the biggest names in rock and pop an hour to play the tunes that inspired them. Today it's Noel Gallagher who's spinning the platters.